Zero-offset sections with a deblurring filter in the time domain

Shihang Feng, Oz Yilmaz, Yuqing Chen, Gerard T. Schuster

Research output: Contribution to journalArticlepeer-review

Abstract

The conventional common-midpoint stack is not equivalent to the zero-offset section due to the existence of velocity uncertainty. To obtain a zero-offset reflection section that preserves most reflections and diffractions, we have developed a velocity-independent workflow for reconstructing a high-quality zero-offset reflection section from prestack data with a deblurring filter. This workflow constructs a migration image volume by prestack time migration using a series of constant-velocity models. A deblurring filter for each constant-velocity model is applied to each time-migration image to get a deblurred image volume. To preserve all events in the image volume, each deblurred image panel is demigrated and then summed over the velocity axis. Compared with the workflow without a deblurring filter, the composite zero-offset reflection section has higher resolution and fewer migration artifacts. We evaluate applications of our method to synthetic and field data to validate its effectiveness.
Original languageEnglish (US)
Pages (from-to)S239-S249
Number of pages1
JournalGeophysics
Volume84
Issue number4
DOIs
StatePublished - 2019

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